"omniauth-twitter" email id is not fetched from twitter in ruby on rails

Question

i am using omniauth-twitter gem to enable Twitter login in my rails application. Here is my code ...

gemfile -

gem 'omniauth', '~> 1.1.1'
gem 'omniauth-twitter'

routes.rb -

 match '/auth/twitter/callback', to: 'users#twitter_login'
 match 'auth/failure', to: 'static_pages#home'

User_controller.rb -

     def twitter_login
       auth = request.env['omniauth.auth'] 
       authentication = Authentication.find_by_provider_and_uid(auth['provider'],auth['uid'])
       if authentication
          sign_in authentication.user
          redirect_to root_url
       else
         if(User.where(:email => auth['extra']['raw_info']['email']).exists?)
            flash[:notice] = "You already have account in ibetter"
            redirect_to root_url        
         else
            user = User.new
            user.apply_omniauth(auth)        
            if user.save(:validate => false)     
              sign_in user           
              flash[:notice] = "Welcome to Ginfy"          
              redirect_to root_url
            else
              flash[:error] = "Error while creating a user account. Please try again."
              redirect_to root_url
            end
          end
      end
    end

session_helper.rb -

  def sign_in(user)
    cookies.permanent[:remember_token] = user.remember_token
    self.current_user = user
  end

User.rb model -

  before_save { |user| user.email = email.downcase }
   def apply_omniauth(auth)
    self.email = auth['extra']['raw_info']['email']
    self.name =  auth['extra']['raw_info']['name']
    authentications.build(:provider => auth['provider'], :uid => auth['uid'], :token => auth['credentials']['token'])
   end

erb code -

<%= link_to image_tag("login-twitter.png", alt: "twitter"), "/auth/twitter",:class => "popup", :"data-width" => "600", :"data-height" => "400" %>

Email id is not fetched from twitter. Please help

Answer 1

Twitter doesn´t give you the email via API.

This works if you are using omniauth-facebook gem for example, but twitter doesn´t offer you the email - you have to create a workaround.

For example ask the user in a second step to fill in his/her email address.